[jira] [Updated] (AMBARI-16949) Metrics Collector API shows NPE if we use wildcard (%25 for '%') for metric name

["Aravindan Vijayan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-16949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aravindan Vijayan updated AMBARI-16949:
---------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.4.0
           Status: Resolved  (was: Patch Available)

Pushed to trunk and branch-2.4

> Metrics Collector API shows NPE if we use wildcard (%25 for '%') for metric name
> --------------------------------------------------------------------------------
>
>                 Key: AMBARI-16949
>                 URL: https://issues.apache.org/jira/browse/AMBARI-16949
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-metrics
>    Affects Versions: 2.4.0
>            Reporter: Jungtaek Lim
>             Fix For: 2.4.0
>
>         Attachments: AMBARI-16949-trunk-v1.patch
>
>
> When we request '/ws/v1/timeline/metrics' with metric name which contains %25 (escaped '%'), response for the API is json describing there's NPE.
> And NPE is logged for ambari-metrics-collector log file.
> {code}
> 2016-05-30 09:15:05,061 WARN org.apache.hadoop.yarn.webapp.GenericExceptionHandler: INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
> 	at org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.appendAggregateMetricFromResultSet(PhoenixHBaseAccessor.java:810)
> 	at org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.getAggregateMetricRecords(PhoenixHBaseAccessor.java:772)
> 	at org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.HBaseTimelineMetricStore.getTimelineMetrics(HBaseTimelineMetricStore.java:178)
> 	at org.apache.hadoop.yarn.server.applicationhistoryservice.webapp.TimelineWebServices.getTimelineMetrics(TimelineWebServices.java:372)
> 	at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
> {code}
> Reason of NPE: 
> Metrics are properly fetched with wildcard. But when applying functions to result set, actual metric name is not exist from map of metric name to list of function.



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